帝国cms怎么判断用户用手机访问的方法

functioncheck_wap(){
//先检查是否为wap代理，准确度高
if(stristr($_SERVER['HTTP_VIA'],"wap")){
returntrue;
}
//检查浏览器是否接受WML.
elseif(strpos(strtoupper($_SERVER['HTTP_ACCEPT']),"VND.WAP.WML")>0){
returntrue;
}
//检查USER_AGENT
elseif(preg_match('/(blackberry|configuration//cldc|hp|hp-|htc|htc_|htc-|iemobile|kindle|midp|mmp|motorola|mobile|nokia|operamini|opera|Googlebot-Mobile|YahooSeeker//M1A1-R2D2|android|iphone|ipod|mobi|palm|palmos|pocket|portalmmm|ppc;|smartphone|sonyericsson|sqh|spv|symbian|treo|up.browser|up.link|vodafone|windowsce|xda|xda_)/i',$_SERVER['HTTP_USER_AGENT'])){
returntrue;
}
else{
returnfalse;
}}

$agent=check_wap();if($agent){
header('Location:http://m.你的域名.com');
exit;
}